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社评“范冰冰黑大粗茎”-知识课堂

如何正确挑选、范冰冰黑大粗茎佩戴防霾口罩?

来源: 中关村在线
2024-12-06 16:01:57

最佳回答

“范冰冰黑大粗茎”如何正确挑选、范冰冰黑大粗茎佩戴防霾口罩?

  如何范冰冰黑大粗茎正确挑选、佩戴防霾口罩?|范冰冰黑大粗茎“一周健康”专栏

  长沙晚报12月5日讯(全媒体记者 杨云龙 通讯员 王文强)冬季是雾霾的易发时期,如果遇到雾霾天气,如何正确选择和佩戴防霾口罩,减少雾霾颗粒物的吸入?近日,长沙市疾控中心提醒,选购口罩时要考虑使用者的脸型和舒适性等因素。

  研究表明,判断口罩的防护效果,需要从人体头面部密合度、呼吸阻力、颗粒物过滤效率、人群的适配性、卫生安全性五个方面评价。目前,市场上销售的普通一次性无纺布口罩对于灰尘和大颗粒物可能有一定的阻挡效果,但对于雾霾、PM2.5或细菌、病毒等微生物颗粒的防护是不足够的。建议选择标有KN95或N95(过滤非油性颗粒物最低效率为95%)、FPP2(最低过滤效率94%)的口罩。

  佩戴口罩前及摘下口罩前后都需洗手,佩戴期间若必须触摸口罩,在触摸前后也要彻底洗手。口罩每次佩戴后,必须进行佩戴气密性检查:双手捂住口罩呼气,若感觉有气体从鼻夹处漏出,应重新调整鼻夹;若感觉气体从口罩两侧漏出,需要进一步调整头带、耳带位置;如果不能获得很好的密合性,需更换口罩型号。

  口罩不适合长时间佩戴,一是口罩外部吸附了颗粒物等污染物,造成呼吸阻力的增加;二是口罩内部会积累呼出气中的细菌、病毒等。对于无呼气阀的一次性口罩,原则上不要佩戴超过1小时;对于有呼气阀的口罩,原则上不要佩戴超过1天。建议佩戴者根据口罩的呼吸阻力和卫生条件的可接受程度,适时更换口罩。

  佩戴口罩一般会增加呼吸阻力和闷热感,不是每个人都适合佩戴口罩。特殊人群选择防护口罩要小心谨慎,比如孕妇佩戴防护口罩,应注意结合自身条件选择舒适性比较好的产品,如配有呼气阀的防护口罩,可以降低呼气阻力和闷热感,佩戴前应向专业医师咨询;儿童处在生长发育阶段,脸型小,一般口罩难以达到密合的效果,建议选择正规厂家生产的适合儿童佩戴的防护口罩;老年人、慢性病患者及患有呼吸系统疾病等特殊人群,建议在专业医师指导下使用。(长沙晚报)

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